[openaddresses] Ignoring fields with null-like values as well (there appear to be no valid places named Null or None...yet)

scripts/geodata/openaddresses/formatter.py

@@ -27,6 +27,7 @@ OPENADDRESS_FORMAT_DATA_FILENAME = 'openaddresses_formatted_addresses.tsv'
 
 multiple_spaces_regex = re.compile('[\s]{2,}')
 numeric_range_regex = re.compile('[\s]*\-[\s]*')
+null_regex = re.compile('^\s*(?:null|none)\s*$', re.I)
 not_applicable_regex = re.compile('^\s*n\.?\s*/?\s*a\.?\s*$', re.I)
 
 
@@ -171,7 +172,7 @@ class OpenAddressesFormatter(object):
                     if value and len(value) < 2 or is_numeric(value):
                         continue
 
-                if not_applicable_regex.match(value):
+                if not_applicable_regex.match(value) or null_regex.match(value):
                     continue
 
                 value = multiple_spaces_regex.sub(six.u(' '), value)